Application tier support on HP-UX Itanium as well
as Linux x64 is planned for Release 12, and is
being evaluated, but is not yet committed or planned, for Linux Itanium, Windows
Itanium, and Windows x64. Support for Sun Solaris SPARC, HP-UX PA RISC, and IBM
AIX (all 64-bit) will be continued.

As you have also confirmed previously, HP Tru64 Unix is not likely to be a supported platform for Release 12. For anyone on this platform who wishes to upgrade to R12, this means a migration to another platform must be done as part of the upgrade.

Steven,
With Release 12 certified on both all 64bit on all nodes or 32bit on 64bit database nodes. Is there a recommendation from Oracle why all 64bit would be better that the traditional 32bit on 64bit?

Hi, John,Here's a reply excerpted from an internal discussion about your question:"If your question is why would someone choose to deploy a 64-bit database tier,
whether on a fully supported 11i platform (such as HP-UX PA RISC, Sun SPARC or
IBM AIX) or an 11i split configuration platform (such as Linux Itanium, Linux
x64, or Windows Itanium), the answer is scalability.&nbsp; The large amount of
addressable memory not available on 32-bit platforms can handle many more
processes and connections."Regards,Steven

I have a customer asking about 11i Split configuration information. When will Linux86-64 be certified for application and database tiers? It appears that the customer needs to move to R12 in order to have Linux86-64 on both apps and db tiers. Any feedback would be appreciated.

Yes, this certification is planned for HP-UX Itanium 11.3.1. Oracle's Revenue Recognition rules prohibit us from discussing certification and release dates, but you're welcome to monitor or subscribe to this blog for updates, which I'll post as soon as soon as they're available.

Our customer has a production environment of 11.5.10.2 on RHEL5.arch and uname -m etc shows that the application system O.S as i686.I belive this means that the application is on 32 bit O.S.Now the client wants to upgrade to R12.2 on the same platform?Is that possible?I do not believe so,as because R12 is only supported on 64 bit O.S platforms on RHEL.Also once I have upgraded my O.S to 64 bit,then the exusting application i.e 11i will not work right?
In this case what can be my options?Without downtime of the Production I cannot upgrade the O.S right?And after that 11i will not function.The downtime has to be extended till the time the R12 Upgrade finishes and fully functional.

hello Pritam -
As 12.2 only supports 64-bit OSes on x86-64, you will need to install the application tier of 12.2 on a new 64-bit OS when you do the R12 upgrade.
Note that as part of any EBS R12 upgrade one lays down a brand new R12 appl top, typically on a new OS instance that meets the updated R12 OS requirements (which are different from 11i), and discards the 11i appl top. This is different from 11i upgrades (such as upgrading from 11.5.9 to 11.5.10) wherein the existing 11i appl top is updated.
Just about all modern hardware today supports 64-bit OSes, and you should check with the system vendor on running a 64-bit OS on this system. 64-bit OSes provide many advantages such as increased memory bandwidth to run enterprise loads - the support of 64-bit only OSes is increasingly common amongst modern applications.
Regards,
John